The housing sector Index is outperforming the S&P 500 so far in 2015, led by Armstrong World, Lennox, Masco, Owens Corning and Vulcan Materials.

NEW YORK (TheStreet) - Armstrong World (AWI), Lennox International (LII), Masco (MAS), Owens Corning (OC) and Vulcan Materials (OC) are five components in the PHLX Housing Index, which contains 19 companies; 11 homebuilders and eight companies that provide products and services supporting the housing market.

The housing index has a year-to-date gain of 8.5% beating the S&P 500, which has a gain of 3.3%. Housing's outperformance narrowed from a 10% gain, while the S&P 500 was up just 0.4% on April 6.

Let's look at the weekly chart for the housing index:

Courtesy of MetaStock Xenith

The weekly graph for the housing index focuses on the Fibonacci Retracement levels of the popped housing bubble, which saw this index decline 82% from 293.66 in July 2005, to a low of 54.31 in March 2009. The housing index has been above its 61.8% retracement, at 202.05, since July 2014, with a multiyear intraday high of 238.32 set on April 6. The 200-week simple moving average at 170.74 is the longer-term uptrend for this index.

Here are the year-to-date performance measures for the companies that support housing.

Armstrong World had a close of $57.25 on Tuesday, up 12% year to date vs. 11% on April 6. The designer of floors, ceilings and cabinets has a neutral weekly chart with the stock above its key weekly moving average of $56.38, but with declining weekly momentum.

Investors looking to buy Armstrong should place a good-till-canceled limit order to purchase the stock if it drops to $53.69, which is a key level on technical charts until the end of June.

Investors looking to reduce holdinsg should place a good-till-canceled limit order to sell the stock if it rises to $59.25, which is a key level on technical charts until the end of June.

Lennox International had a close of $114.10 on Tuesday, up 20% year to date vs. 18% on April 6. The air conditioning and heating company has a positive weekly chart with the stock above its key weekly moving average of $110.28.

Investors looking to buy Lennox should place a good-till-canceled limit order to purchase the stock if it drops to $90.61, which is a key level on technical charts until the end of June.

Investors looking to book profits should place a good-till-canceled limit order to sell the stock if it rises to $114.43, which is a key level on technical charts until the end of June. This key level was tested as the stock set an all-time intraday high of $115.21 on Tuesday.